A few days later.
Li Feiyu began to refine the supreme earth yin stone, integrating it into the Soul Devouring Yin Plate, a process that took two months.
During this period, the Divided Soul of the Ghost King rioted, and Li Feiyu had no choice but to provide one drop of longevity liquid to the Soul Devouring Yin Plate daily, allowing it to burn and suppress the Ghost King until this forging process was complete.
After incorporating the supreme earth yin stone, the power of the Soul Devouring Yin Plate increased by another notch. However, even so, refining the Divided Soul of the Ghost King was still not easy, requiring preparations for a long battle.
Nevertheless, if successful, the effort would naturally be worthwhile.
Li Feiyu let the Artifact Spirit refine with peace of mind. For a long time to come, he no longer planned to go out but would focus on Cultivating Five Elements Cultivation Technique, refining Medicinal Pills and Magic Treasures, and enhancing his combat power.
Time passed day by day.
For five, then ten years, the door to Li Feiyu's Immortal Cave remained unopened.
In the twelfth year, the Golden-backed Demonic Mantis broke through to a Level 5 Demon Beast, its aura becoming even more ferocious. Soon after, the Crimson Crow broke through to a Level 6 Demon Beast.
Two more years passed, and the Soul Devouring Golden Cicada broke through.
Li Feiyu provided them with Pregnancy Pill, and they all began to prepare to lay eggs, expanding their species' population.
Pregnancy Pill is a Medicinal Pill specifically for Spirit Insects, which can promote egg-laying and, with a certain probability, increase the number of eggs.
However, the Pill Formula for this was very difficult to gather. Li Feiyu only found the required Spirit Medicines in the Taiyin Cave, cultivated them to the level of Millennium Spirit Medicine, and then began to attempt refining them.
In the same year, Li Feiyu broke through to the Core Formation Middle Stage under the influence of Medicinal Pills and his Heavenly Spiritual Root.
Another ten years passed, and the 'Taiyin True Scripture', 'Inferno Apex Meridian Art ', and 'Azure Wood Green Thunder Art' were cultivated to the Core Formation Middle Stage.
At this time, 'Earth Emperor Skill' and 'Ten Thousand Swords Skill' had just entered the Late Foundation Establishment stage.
Thereafter, Li Feiyu wholeheartedly cultivated 'Earth Emperor Skill' and 'Ten Thousand Swords Skill', spending over a decade to bring them to par with his other Cultivation Techniques.
Afterward, Li Feiyu organized various Materials, optimized Magical Artifacts, and refined Magic Treasures.
The Phantom Divine Needles had soul startling iron added to it, and the Black Hidden Spider silk successfully advanced to a Magic Treasure. It moved without a trace, its power not obvious; being injured by it would not only cause poisoning but also damage Divine Sense, making its ability to ambush even more formidable.
Others could only rely on sound to discern its location.
Additionally, he used a large amount of Black Hidden Spider silk plus some other Materials to create a seamless clothes that could conceal his Realm, suppress his aura, and hide his figure.
Unless a Cultivator above the Core Formation Middle Stage forcibly probed, no one would be able to discern Li Feiyu's Realm.
And Cultivators who would forcibly probe could basically be considered enemies.
What awaited them would be Li Feiyu's storm-like attacks.
He did not easily provoke others, but that did not mean others could provoke him!
Not long after, Li Feiyu began to refine the various Magic Treasures harvested from the Taiyin Cave. Among them, the golden sword of the Elder of Wan Jianmen and the rock turtle shield of the Elder of Ten Thousand Dharma Gate, he planned to exchange them later and did not refine them.
The Poison Dragon Cone was a Medium Grade Magic Treasure, extremely powerful, and Li Feiyu temporarily kept it. As for the bell in Immortal Master Taiyin's Storage Pouch, it was an ancient treasure called the Illusion Heart Bell. Once activated, it would cause those nearby to fall into a Heart Demon illusion.
Those with heavier Heart Demons were more easily confused, but it could be resisted with a powerful Divine Sense.
As for the jade box, it had a powerful Restriction on it and could not be opened. Li Feiyu estimated that it would require a Nascent Soul Cultivation to open it.
After dealing with the Artifact Refining matters, Li Feiyu began to try Cultivating the latter half of the True Yang Body. With the provision of Level 6 Fire Crow essence blood, Li Feiyu only took five years to achieve Major Achievement, enough to resist some not-so-powerful Magic Treasures with his bare hands.
This speed far surpassed the time recorded in the Cultivation Technique.
Li Feiyu felt it was due to the Crimson Crow's Bloodline improving again. With its current Level 6 Demon Beast status, plus the ability to unleash Sun True Fire three times, its combat power was already completely on par with most Level 7 Demon Beasts.
After successfully Cultivating the True Yang Body, Li Feiyu continued to Cultivate the Divine Abilities and Spells from his other Cultivation Techniques.
Cultivation knows no years; sixty odd years passed in the blink of an eye.
One day, the Spiritual Qi within a hundred miles around a certain Immortal Cave gathered frantically, forming a visible Spiritual Qi vortex.
Nearby Cultivators, whether they were just passing by or residing in the vicinity, all stopped to look, with surprised expressions in their eyes.
Heavenly Star City's market was far from here, but the drastic changes in Spiritual Qi could not be hidden from Core Formation stage Cultivators. They glanced in the direction of the Immortal Cave where the Spiritual Qi had drastically changed; some remained calm, some frowned slightly, and some were slightly excited.
As for those below Core Formation stage, they were naturally filled with envy or jealousy.
"Someone is forming a Core? At this time... could it be him?"
Li Feiyu's Immortal Cave, which had not opened for over sixty years, finally opened. He looked in the direction where the Spiritual Qi was gathering, a slight smile on his lips, "It really is him."
"Yes, it's about time he formed his Core."
"In the blink of an eye, I'm already over one hundred thirty years old."
Li Feiyu's voice was filled with endless emotion, as if he were already very old.
But for Core Formation stage Cultivators, Li Feiyu had just entered his prime; if calculated by centuries, he hadn't even reached his thirties.
"To break through to the late stage Core Formation, it will take about another twenty years."
Li Feiyu couldn't help but marvel at the bonus effect of Heavenly Spiritual Root Aptitude on Cultivation. As long as he prepared the items for forming a Nascent Soul, breaking through to Nascent Soul before the age of two hundred would be no problem at all.
Due to being busy with other matters, Li Feiyu's Great Development Art had not yet reached the third layer, still lacking a bit.
"It seems I have to try the soul tempering pill. I have the Soul Devouring Beast's inner core; what's left are spirit awareness fruit, Heavenly Heart Grass, and Heavenly Fragrance Flower."
Li Feiyu murmured, then went to check the various insect chambers.
Currently, Li Feiyu had opened three more insect chambers, belonging to the Black Hidden Spider, Soul Devouring Golden Cicada, and Golden-backed Demonic Mantis, respectively.
The Black Hidden Spiders had increased by thirty Level 1 low-grade small Black Hidden Spiders. The Soul Devouring Golden Cicadas laid a large number of eggs, now numbering nearly seven to eight hundred, while the Golden-backed Demonic Mantis also had fifty to sixty individuals.
As for the Gold Devouring Bugs, under the continuous Catalysis of rainbow skirt grass, they numbered in the tens of thousands, each with distinct golden spots on their shells, appearing exceptionally ferocious.
Feeling at ease, Li Feiyu took the Crimson Crow and left, heading to Heavenly Star City's market to purchase these three Spirit Plants.
Celestial Herb Pavilion, among the Spirit Plant shops Li Feiyu knew in Heavenly Star City's market, had the most diverse and complete selection of Spirit Plants.
They were dedicated to searching for all kinds of rare and exotic flowers and grasses. Some rare Spirit Plants might not be found elsewhere, but at Celestial Herb Pavilion, one might just make a discovery.
"Senior, what Spirit Plants are you looking for at our Celestial Herb Pavilion?"
The Qi Refining stage attendant greeted him with a smile. Although he couldn't discern Li Feiyu's Realm, he guessed he must be a Cultivation Senior.
"Heavenly Fragrance Flower, Heavenly Heart Grass, and spirit awareness fruit," Li Feiyu said calmly, "The age doesn't matter; a lower age is fine."
After listening, the attendant lowered his head in thought, seemingly recalling these three Spirit Plants. A moment later, he said, "Senior, we have Heavenly Heart Grass and Heavenly Fragrance Flower at Celestial Herb Pavilion, from twenty years old to three hundred years old; you can choose any age. However, the spirit awareness fruit..."
The attendant paused, "This is a rare Spirit Fruit. Even if eaten directly, it can have the effect of increasing a Cultivator's Divine Sense. The older the spirit awareness tree that bears the spirit awareness fruit, the stronger the effect. A thousand-year-old spirit awareness fruit has a significant effect even on Core Formation stage Seniors, and as for ten thousand years, it is rumored to be useful even for Nascent Soul."